Long-range geoid testing by GPS-leveling data in Turkey

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dc.contributor.authorUstun, A
dc.contributor.authorDemirel, H
dc.date.accessioned2020-03-26T17:03:50Z
dc.date.available2020-03-26T17:03:50Z
dc.date.issued2006
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractA long-range geoid testing procedure is presented using a geometrical geoid profile, which extends in an approximate north-south direction between the Mediterranean and the Black Sea. Along the first-order leveling line of the Turkish National Vertical Control Network (TNVCN), 47 leveling benchmarks at 20-25 kin intervals were selected as global positioning satellite (GPS)-leveling control points with known Helmert orthometric heights. The geometrical geoid profile computed from GPS-leveling data was compared with the national Turkish Geoids 1991 (TG91) and 1999A (TG99A), and global geoids OSU91 A and EGM96. In absolute geoid testing, it is verified that TG91 has a tilt and bias with respect to the GPS-leveling geoid. TG99A, which has no tilt and bias, displays the root mean square agreement of +/- 12 cm in the north-south direction. In relative geoid testing, it is understood that TG91 can only be used at 25 km or shorter baseline lengths, whereas TG99A can be used over all baseline lengths with an accuracy that is equal to the tolerance value for the second-order leveling control.en_US
dc.identifier.doi10.1061/(ASCE)0733-9453(2006)132:1(15)en_US
dc.identifier.endpage23en_US
dc.identifier.issn0733-9453en_US
dc.identifier.issue1en_US
dc.identifier.scopusqualityQ3en_US
dc.identifier.startpage15en_US
dc.identifier.urihttps://dx.doi.org/10.1061/(ASCE)0733-9453(2006)132:1(15)
dc.identifier.urihttps://hdl.handle.net/20.500.12395/20569
dc.identifier.volume132en_US
dc.identifier.wosWOS:000234955300004en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherASCE-AMER SOC CIVIL ENGINEERSen_US
dc.relation.ispartofJOURNAL OF SURVEYING ENGINEERING-ASCEen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjectglobal positioningen_US
dc.subjectlevelingen_US
dc.subjectgeoiden_US
dc.subjectverificationen_US
dc.subjectTurkeyen_US
dc.titleLong-range geoid testing by GPS-leveling data in Turkeyen_US
dc.typeArticleen_US

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